PICARI&] 7 



the basi- sphenoid or upon its rostrum, which articulates with facets 

 on the pterygoids, is a character of considerable value in the 

 diagnosis of certain groups of birds (fig. 5, p. 5). 



VII. Mr. Garrod laid great stress on the presence or absence 

 of five muscles in the thigh of birds ; although subsequent research 



FIG. 7. Base of the skull of Dromceus, showing the dromseogrmthous 

 arrangement of the palate bones : vo, vomer ; lac, lacrymal ; sph.r, sphenoidal 

 rostrum ; pa, palatine ; ptg, pterygoid ; b.sph, basi-sphenoid ; q, quadrate ; 

 b./>t<t ]>ro, basi-pterygoid process of the basi-sphenoid. 



has shown that this character is not one of primary value, yet it 

 is still a useful one. 



These muscles are the ambiens, femoro-caudal, accessory 

 femoro-caudal, semitendinosus and accessory semitendinosus. 



